Shaft-coupling.



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S. F. SMYTH.

SHAFT COUPLING. (Ap plication filed June 13, 1o1.

(No Model.)

Patented Dec. 3, IBM.

ATFNT rrrcn.

SAMUEL F. SMYTII, OF BROOKLYN, NEIV YORK.

SHAFT-COUPLING.

SPECIFICATION forming part of Letters Patent No. 687,864, dated December3, 1901. Application filed June 13, 1901. Serial No. 64,375. (No model.)

To all whom it may concern:

Be it known that LSAMUEL F. SMYTi a citizen of the United States,residing at 24.1 Steuben street, Brooklyn, Kings county, State of NewYork, have invented certain new and useful Improvements in Shaft-Couplings, fully described and represented in the followingspecification and the accompanying drawings, forming a part of the same.

The present invention relates to that class of shaft-couplings in whicha divided double cone is clamped upon the adjacent ends of the shaft bymeans of collars movable endwise over the cones. has sometimes been madein halves, in which case the clampiu g pressure only operates upon twoopposite sides of the shaft and does not grip it firmly, as is required,and in such couplings it is common to fit a key to the shaft and to thedouble cone to prevent the shaft from slipping within the cone. In othercases the double cone has not been divided at all, but has been slitradially for a portion of its length upon two different diameters, thusadapting the parts to yield more or less in four directions. In otherconstructions where a plain double cone has not been used thecoupling-sections have been provided with tapering grooves and othermeans for pressing them together 5 but the plain double cone with plainconical collars to clamp and compress the same is the cheapestconstruction, and my invention relates to such a dou ble cone. In thepresent invention I divide the double cone longitudinally into more thantwo distinct sections, which are entirely free to contract or expand ateither end, so as to firmly grip the opposed ends of the shaft. Suchloose sections, are difficult to hold in place while applying them tothe shaft and are liable to slip endwise when fitting the collarsthereto, so that a portion only of the sections is liable to bear allthe clamping strain, and thus prevent the normal operation of thecouplin To avoid such difficulty in the use of three or more loosesections and to hold the sections coincident while fitting the collarsthereto, I provide the several sections of the double cone with one ormore offsets upon their adjacent edges, the shoulder formed by theofiset upon each section interlocking or engaging with a correspondingHeretofore the double cone shoulder upon the adjacent section. Suchoffsets are at right angles to the edges of the sections and prevent thelongitudinal displacement of the several sections and enable them toresist as a whole the longitudinal thrust of the coupling-collars, whichnecessarily produce great friction upon the sections by their heavyclamping pressure. To hold the loose sections upon the shaft whileapplying the coupling-collars thereto, an annular groove may be formedin the exterior of the sections and an elastic band fitted to suchgroove to hold them in place. The band being sunken below the surface ofthe sections does not interfere in any way with the operation of theclamping-collars. Several are rangements of the shoulders upon thesections are shown in the annexed drawings, in which Figure 1 is a viewof a coupling divided lengthwise with the shaft ends fitted inside thedouble cone. Fig. 2 is a view of the shaft ends with the double-conesections applied thereto and held thereon by an annular spring. Fig. 3is an end view of the double cone formed in four sections with a singleoffset upon each section, the sections in Figs. 1 and 2 being similarlyformed. Fig. 4 is a side View of the double cone in which the sectionsare formed with two offsets upon each of their edges. Fig. 5 is an endview of the coupling. Fig. 6 is an in side view of one of thedouble-cone sections with a single ofiset upon each edge, as shown inFigs. 1, 2, and 3. Fig. 7 is an inside view of one of the doubleconesections with two offsets upon each edge, as shown in Fig. 4, and Fig. 8shows a springband.

a designates the shell of the coupling, having one of theclamping-collars 1) formed inside of the same. The other collar 0 ismovable within the shell and drawn toward the collar 7) by bolts cl.

The double-cone sections 6 are shown in Fig. 2 applied to the shaft endsf and formed each with a single offset, which produces a lateralshoulder g. Such shoulder obviously prevents the longitudinal slippingof either section in one direction, and the reverse shoulder upon theopposite edge of each section, as shown in Fig. 6, prevents longitudinalslipping in the opposite direction. When the sections are laid upon theshaft ends,they are readily adjusted with their ends coincident, asshown in Figs. 1, 2, and 4, the shoulders serving to set them instantlyin the right relation and holding them in position while the collars band c are applied. The shoulders thereafter resist any displacement ofthe sections while the collars are being drawn together by the bolts (1,and each of the doublecone sections thus receives an equal pressure fromthe collars. As the collars can move independently of one another, thecollar at one end may operate to compress the sections more than at theother end, so as to grip the shaft end firmly which lies within suchportion of the sections, whether the shaft ends be identical in size ornot.

Fig. 4: shows each section formed with reverse shoulders upon bothedges, the shoulders being indented at one edge to form a recess h andprojected at the opposite edge to form a tongue 4}, which fits suchrecess.

The sections are of plain conical form at each end, expanding toward themiddle, and the collars in like manner are of plain conical bore,tapering toward their outer ends, and both collars and cones are thusmade in the cheapest manner. To hold the sections upon the shaft whenfirst applied, before the collars are fitted thereto, the spring-band j(shown in Fig. 8) may be applied to an annular groove '10 upon theexterior of the sections, as shown until the collars are screwed up, andthe subdivision of the double cone into sections more numerous than twoenables such sections to press upon many sides of the shaft and to thusgrip the shaft in the most rigid manner. Experience has shown that withsuch a'numerously-divided double cone the shaft can be sufficientlygripped without the expense of key-setting the same and the double cone.

- Having thus set forth the nature of theinvention, what is claimedherein is- 1. In a shaft-coupling, the combination, with an exteriorshell and suitable collars having plain conical bores and means fordrawing them together, of a plain double cone wholly divided into threeor more sections, and the division-lines being each upon difierentadjacent radial planes, with such planes connected by a transverseshoulder or offset to hold the ends of the sections coincident upon ashaft.

2. In a shaft-coupling, the combination, with an exterior shell andsuitable collars having plain conical bores and means for drawing themtogether,0f a double cone wholly divided into three or more sections andthe divisionlines being each upon different adjacent radial planes, withsuch planes connected by two transverse shoulders or offsets operatingto lock the sections together longitudinally and to hold their endscoincident upon the shaft.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

SAMUEL F. SMYTH. Witnesses:

J AOOB MARX, W. H. VAN STERNBERGH.

